Sound record



Feb. 24, 1942. L.'A. HERZ'IG SQUND RECORD Original Filed April 24, 195'? D D D D U D U D U INVENT R i m;% B a ATTORNEYS Patented Feb. 24,

ST -res. PAT NT. OFFICE 2,273,863

sum neeonn We mm; Heights, R.

Iilnof a-lone, 0., a corporation oiLNew York application April 24, 193?; Serial No. vi this application Abril 30,

Original dcdand .1940, Scrhl No. 332,443

cation Serial No. 138,751, filed April 24, 1937, now Patent #2315368, issued September 24, 1940.

The. objects of the invention are: to provide a new and improved photographic sound record;

to provide a record in theform of a film having a plurality of parallel sound record tracks thereon which are" adapted to be played successively provide a record of the foregoing type in which Y as- New York, N. Y

3 Claims. (01.274.441.61

This invention relates to a photographic sound record and is a division of my copending appli-' ing the grid potential of a space discharge tube by the capacity eilect of a conducting bar or strip-which is formed in or attached to the film adjacent the ends of the aligned loopsof the sound tracks, the control being eilected when the conducting. strip reaches a predetermined the successive tracks are played by moving the film first in one direction and then in the reverse direction, and are joined to each other by uniform loops forming parts of the sound tracks; and to provide a record of this type in which the loops connecting the sound tracks are exactly positioned and are all aligned in the same transvere section of the film.

The mm of the present invention is particu-' larly adapted for use in recording'or reproducing sound for broadcasting purposes, for assem-- blies for record libraries or for other purposes for which phonographs orv film have heretofore been used. An important feature of the invention resides in the use of a comparatively short film containing'a plurality of sound tracks which are played successively. A standardwidth 35 film may, for example, have some thirty different sound so arranged that the scanning light of the reproducing apparatus follows'the loops on the mange-over without audible variation. In operthadllm istheld on :two reels and is-fedtracks which'are joined by loops first in one direction and then in the other for scanning each of the difi'erent connected tracks which constitute the sound record.

In the sound. recording and reproducing apparatus of my above-mentioned Patent #2,215,468, with which the film of the present invention is adapted to be used, the film is fed past a sound gate by suitable means such as apair of sprockets which are reversibly driven in unison. In said machine a pair of driveshafts having suitable vibrati n dampeners are continuously driven in op zmite directions. and an electrically operated clutch mechanism is provided'to selectively connect the sprockets in driving relationship to the respective driveshafts. Due to k the novel construction of my film, as hereinafter described, themechanism is automatically operated by the film itself whenever the. end of a sound track has; been reached,--or itmaybe operated manually. In. the preferred embodisound "tracks ,comprise the loops 5 forming a point with respect to the sound gate. 1 3

These and other features and advantages of the invention will be described in connection with the accompanying drawing which is a plan view of a strip offilm embodying said invention. The film 3 itself may be of the usual type employed in motion pictures and is shown more in detail in the drawing as having a plurality of parallel photographic sound record tracks 4 which extend over substantially the entire length of the film and are joined at theirends by-loops 5. The successive tracks are recorded with the film moving in opposite directions so that a continuous sound record is obtained by follow- 'ing the tracks in succession and reversing the film as the end of each track is reached. The film has the usual perforations 6 which cooperate with suitable teeth on the drive sprockets andis provided adjacent its two ends, at predetermined points with respect to the loops 5, with strips 1 of conducting material which may be'sprayed or painted on the film or may be formed separatelyandattached thereto in any convenient way. a

The conducting strips I areused for automatically reversing the film 3 in a manner described in my above-mentioned Patent #2215,- 468. It is to be understood that the fllmdtself may be of any suitable or standard construction.

that the said interconnected ends of successive continuous photographic record adapted to be scanned without break or interruption. The said 7 loops I at each end of the tracks [all lie in .86 the sametransversehectlon of the filmand are.

oi the same dimensions. The transverse strips ing a continuous photographic record adapted to be scanned without break or interruption, said loops at each end oi said tracks all lying in the same transverse section of said film and belns 5 of the same dimensions.

thereon a pin-Q ing a continuous photographic record adapted i to be scanned without break or interruption.

2. A film having photographed thereon a plurality of spaced parallel sound tracks having interconnected ends, the interconnected ends oi' successive sound tracks comprising loops forma a transverse strip of conducting material extend v ing across one face of said film and spaced longi- ,3. A film h 'ving photographed thereon a plurality of spaced parallel sound tracks having interconnected ends, the interconnected ends oi successive sound tracks comprising loops forming a continuous photographic record adapted to be scanned without break or interruption, and

tudinally apredetermined distance from each of LEONARD A. HERZIG. 

